31404420221144 has 32 divisors (see below), whose sum is σ = 58897895310000. Its totient is φ = 15698315267712.

The previous prime is 31404420221077. The next prime is 31404420221149. The reversal of 31404420221144 is 44112202440413.

It is a self number, because there is not a number n which added to its sum of digits gives 31404420221144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31404420221149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1105658447 + ... + 1105686849.

Almost surely, 2^{31404420221144} is an apocalyptic number.

It is an amenable number.

31404420221144 is a deficient number, since it is larger than the sum of its proper divisors (27493475088856).

31404420221144 is a wasteful number, since it uses less digits than its factorization.

31404420221144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57827 (or 57823 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 31404420221144 its reverse (44112202440413), we get a palindrome (75516622661557).

The spelling of 31404420221144 in words is "thirty-one trillion, four hundred four billion, four hundred twenty million, two hundred twenty-one thousand, one hundred forty-four".